Relative dose distribution in Gamma Knife treatment near tissue inhomogeneties


Isbakan F., Buyuksarac B., Agus O., Ulgen Y., Bilge H. B. , Ozen Z.

27th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society, Shanghai, Çin, 31 Ağustos - 03 Eylül 2005, ss.3086-3089 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1109/iembs.2005.1617127
  • Basıldığı Şehir: Shanghai
  • Basıldığı Ülke: Çin
  • Sayfa Sayıları: ss.3086-3089

Özet

The primary goal in this study was to investigate 3-D dose distribution, near the areas of tissue inhomogeneities, in Gamma Knife Radiosurgery with the gel dosimetry. The spherical glass balloon of a diameter of 16 cm filled with the gel forms the homogeneous phantom; and an identical balloon with two corks placed on each side to represent the air cavities forms the inhomogeneous phantom. Dose calibration is performed by irradiating vials at known doses and then utilizing the R2-dose calibration curve. Stereotactic frames and fudicial markers were attached to the phantoms for MR scanning and image processing. Dose distributions from a single shot, using all 201 Cobalt sources, delivered to a known point with identical coordinates, are calculated both in homogeneous and inhomogeneous gel phantoms.